RE: Multiplex Redo Logs with Mirrored Disks?

From: Nick Tilbury _at_ Northampton <_at_>
Date: Tue, 23 Nov 2004 16:48:32 -0000
Message-ID: <152194D388911C4B8D6368EC6511B9F602E819BB@nthex55.eng.vartec.com>

IMHO - What you are questionning is 'best-practice' and relying on hardware solutions to get
you out of any potential failures. I'd say your on a slippery slope. Stick with best practice and have at least 2 members per group.

Nick
-----Original Message-----

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org]On Behalf Of David Wagoner Sent: 23 November 2004 15:47
To: ORACLE-L (E-mail)
Subject: Multiplex Redo Logs with Mirrored Disks?

Is there any need to multiplex redo logs with mirrored disks (e.g., RAID-1 or RAID-1+0)?
Example- Oracle recommends multiplexing redo logs on separate disks, like redo01a.log on Disk1 and redo01b.log on Disk2, etc.

However, now that mirrored disks are in common use with RAID-1+0, RAID-1, etc. it seems that sufficient protection is in place to use only a single copy of each redo log. This would also provide the benefit of reduced disk I/O to write redo information to disk.

Anyone disagree?

Best regards,

David B. Wagoner
Database Administrator

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http://www.freelists.org/webpage/oracle-l Received on Tue Nov 23 2004 - 13:34:19 CST